This Tobacco Hornworm was in my garden. Notice the little white cocoon on the hornworms back.  Tomato and Tobacco Hornworms are green caterpillars usually 3-5 inches long that love to eat tomato leaves and stems. The Tobacco hornworm has 7 diagonal white stripes on each side of its body and a red horn on its back end. The Tomato hornworm has white “V” shaped markings with a black horn on its back end. Both hornworms have five pairs of prolegs, which are soft legs that are on the abdominal segment of the body.

 
They can blend in so well with the green leaves of your tomato plant, you may not even notice them; however, you will notice the  damage to the leaves and stems. They will eat holes in the leaves and at times eat the entire leaf leaving no stems.  During July and August they might even chew on the fruit of tomatoes and eggplants. Tomato hornworms have also been known to eat peppers and potatoes.

How do I know if I have Hornworms?

You will most likely spot the damaged leaves and stems at the top of the plant before you spot the hornworm. Hornworms will feed on the inside of the plant during hot sunny days and move to the outside in the morning and evening. You may notice large, black droppings (frass) that will pile up on the ground below the affected plants.

 
How do I get rid of Hornworms?

Pick them off using gloves and crush them with your foot or cut them in half with a garden tool.

If your Hornworm has small white cocoons attached to its body then leave them alone. The cocoons contain the larvae of a parasitic wasp that is a natural parasite of the hornworm. The wasps will kill the hornworms when they come out of their cocoons and search out other hornworms to attack.

Rototilling your garden after the season will kill the larvae that has burrowed into the soil of your garden.

Looking for more information about growing tomatoes or getting rid of tomato pests? Visit our Tomato Page.

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